> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fiet.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Market chains

Use this endpoint to list supported EVM networks.

For guidance on discovery flows, see [Markets](/business/endpoint/markets).


## OpenAPI

````yaml get /v1/markets/chains
openapi: 3.1.0
info:
  title: Fiet Trading API (Core)
  version: 0.1.0
  description: >
    Hosted control-plane API for the Fiet Interface.


    ## Non-custodial posture

    - This service **does not** sign transactions.

    - This service **does not** broadcast transactions.

    - This service has **no access** to customer funds or keys.


    ## Quote semantics

    `GET /v1/quote` returns **derived** values from live chain state and indexed
    markets.

    It does not create or persist a “quote entity”.
servers:
  - url: https://api.fiet.finance
    description: Production (example)
security:
  - basicAuth: []
tags:
  - name: Health
  - name: Markets
  - name: Quote
  - name: Swap
  - name: Payments
paths:
  /v1/markets/chains:
    get:
      tags:
        - Markets
      summary: List supported chains
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/MarketChain'
components:
  schemas:
    MarketChain:
      type: object
      required:
        - chainId
        - name
      properties:
        chainId:
          $ref: '#/components/schemas/ChainId'
        name:
          type: string
          examples:
            - Ethereum Mainnet
    ChainId:
      type: integer
      format: uint64
      examples:
        - 1
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: Basic Auth (assumed at gateway for MVP)

````